package servlets.module;

import dbProcs.Getter;
import java.io.IOException;
import java.io.PrintWriter;
import java.sql.SQLException;
import java.util.Locale;
import java.util.ResourceBundle;
import javax.servlet.ServletException;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.owasp.encoder.Encode;
import utils.CountdownHandler;
import utils.InvalidCountdownStateException;
import utils.ModulePlan;
import utils.ShepherdLogManager;
import utils.Validate;

/**
 * Class used to return a fresh incremental menu upon completion of a module in incremental mode.
 * <br>
 * <br>
 * This file is part of the Security Shepherd Project.
 *
 * <p>The Security Shepherd project is free software: you can redistribute it and/or modify it under
 * the terms of the GNU General Public License as published by the Free Software Foundation, either
 * version 3 of the License, or (at your option) any later version.<br>
 *
 * <p>The Security Shepherd project is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
 * PURPOSE. See the GNU General Public License for more details.<br>
 *
 * <p>You should have received a copy of the GNU General Public License along with the Security
 * Shepherd project. If not, see <http://www.gnu.org/licenses/>.
 *
 * @author Mark Denihan
 */
public class RefreshMenu extends HttpServlet {

  private static final long serialVersionUID = 1L;
  private static final Logger log = LogManager.getLogger(GetModule.class);

  /**
   * This servlet returns a fresh version of the module menu bar. This is used when completing
   * levels, changing the floor plan or when opening/closing challenges.
   *
   * @param csrfToken
   */
  public void doPost(HttpServletRequest request, HttpServletResponse response)
      throws ServletException, IOException {
    // Setting IpAddress To Log and taking header for original IP if forwarded from
    // proxy
    ShepherdLogManager.setRequestIp(request.getRemoteAddr(), request.getHeader("X-Forwarded-For"));
    boolean isRunning = false;
    boolean isAdmin = false;
    log.debug("&&& servlets.module.RefreshMenu &&&");
    response.setContentType("text/html");
    PrintWriter out = response.getWriter();
    out.print(getServletInfo());
    HttpSession ses = request.getSession(true);

    // Translation Stuff
    Locale locale = new Locale(Validate.validateLanguage(request.getSession()));
    ResourceBundle bundle = ResourceBundle.getBundle("i18n.text", locale);

    if (Validate.validateSession(ses)) {
      ShepherdLogManager.setRequestIp(
          request.getRemoteAddr(),
          request.getHeader("X-Forwarded-For"),
          ses.getAttribute("userName").toString());
      log.debug("Current User: " + ses.getAttribute("userName").toString());
      Cookie tokenCookie = Validate.getToken(request.getCookies());
      Object tokenParmeter = request.getParameter("csrfToken");

      try {
        isRunning = CountdownHandler.isRunning();
      } catch (InvalidCountdownStateException e) {
        String message = "Countdown is in an invalid state: " + e.toString();
        log.error(message);
        throw new RuntimeException(e);
      }

      if (Validate.validateAdminSession(ses, tokenCookie, tokenParmeter)) {
        ShepherdLogManager.setRequestIp(
            request.getRemoteAddr(),
            request.getHeader("X-Forwarded-For"),
            ses.getAttribute("userName").toString());
        log.debug("Current User: " + ses.getAttribute("userName").toString());
        if (Validate.validateTokens(tokenCookie, tokenParmeter)) {
          isAdmin = true;
        }
      }

      // Check if ctf has started/ended
      if (isRunning || isAdmin) {

        if (Validate.validateTokens(tokenCookie, tokenParmeter)) {

          String ApplicationRoot = getServletContext().getRealPath("");
          String userId = (String) ses.getAttribute("userStamp");
          if (ModulePlan.isIncrementalFloor()) {
            log.debug("Returning CTF Menu");
            out.write(
                Getter.getIncrementalModules(
                        ApplicationRoot,
                        userId,
                        ses.getAttribute("lang").toString(),
                        (String) tokenParmeter)
                    + "<script>startScrollsBars();makeSearchList();</script>");
          } else if (ModulePlan.isOpenFloor()) {
            log.debug("Returning Open Floor Menu");
            try {
              out.write(
                  "<li><a id=\"lessonList\" href=\"javascript:;\"><div class=\"menuButton\">"
                      + bundle.getString("generic.text.lessons")
                      + "</div></a><ul id=\"theLessonList\" style=\"display: none;\">"
                      + Getter.getLessons(ApplicationRoot, userId, locale)
                      + "</ul></li><li>"
                      + "<a id=\"challengeList\" href=\"javascript:;\"><div class=\"menuButton\">"
                      + bundle.getString("generic.text.challenges")
                      + "</div></a><ul id=\"theChallengeList\" style=\"display: none;\">"
                      + Getter.getChallenges(ApplicationRoot, userId, locale)
                      + "</ul></li>"
                      + "<script>applyMenuButtonActionsOpenOrTourney('"
                      + Encode.forHtml(tokenParmeter.toString())
                      + "', \""
                      + Encode.forHtml(bundle.getString("generic.text.sorryError"))
                      + "\");openFloorToggleFunctions();makeSearchList();</script>");
            } catch (SQLException e) {
              String message = "Unable to get challenges: " + e.toString();
              log.error(message);
              throw new RuntimeException(e);
            }
          } else {
            if (ModulePlan.isTournamentFloor()) {
              log.fatal("Could not Pick ModulePlan to use (All False). Using Tournament Instead");
            }
            log.debug("Returning Tournament Floor Menu");
            out.write(
                Getter.getTournamentModules(ApplicationRoot, userId, locale)
                    + "<script>applyMenuButtonActionsOpenOrTourney('"
                    + Encode.forHtml(tokenParmeter.toString())
                    + "', \""
                    + Encode.forHtml(bundle.getString("generic.text.sorryError"))
                    + "\");tournamentToggleFunctions();startScrollsBars();makeSearchList();</script>");
          }
        } else {
          log.debug("CSRF Tokens did not match");
        }
      }

    } else {
      log.error("Invalid Session Detected");
      out.write("Your are logged out! Please sign back in!");
    }
    log.debug("&&& END RefreshMenu &&&");
  }
}
